Chua — dx/dt = α·(y − x − g(x)), dy/dt = x − y + z, dz/dt = −β·y, g(x) = m1·x + 0.5·(m0−m1)·(|x+1|−|x−1|). RK4 piecewise-linear circuit ODE, not Aizawa sphere, not Thomas cyclic sin, not Rössler fold, not Lorenz butterfly. Gold low-alpha trail, cap 650. RM = settled silhouette, no animate-on.